Here's a breakdown:
* Horizontal: It runs across the opening, not up and down.
* Structural: It carries weight and is a crucial part of the building's stability.
* Opening: It bridges the gap between the two sides of the opening, whether it's a doorway, window, or other structural element.
* Wall above it: It supports the weight of the wall above the opening, preventing it from collapsing.
The material of a lintel can vary, including:
* Stone: Common in older buildings.
* Wood: Used in framing for houses.
* Steel: Strong and often used in modern construction.
* Concrete: A versatile and often used material.
Essentially, the lintel is like a bridge for the wall, ensuring that the structure remains sound.